Support for drills.



O. F. NELSON.

SUPPORT FOR DRILLS.

APPLICATION FILED SEPT. l. 1915,

1 ,1 96,66; Patented Aug. 29, 1916.

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OSCAR F. NELSON, 011' FORT DODGE, IOWA.

SUPPORT FOR BRIT-LS.

Application filed September 1, 1915.

To all whom it may concern:

Be it known that I, OSCAR F. NnLsoN, a citizen of the United States, residing at Fort Dodge, in the county of Webster and State of Iowa, have invented certain new and useful Improvements in Supports for Drills, of which the following is a specification.

I The present invention relates to improvements in supports for drills, adapted for use in mining rock, coal, or the like.

An important object of the invention is to provide a support of the above mentioned character, formed of parts which may be readily separated to be arranged in a compact manner for shipment, and which may be conveniently assembled and secured in position within a mine or the like, with a drill attached to the vertical or horizontal portions thereof.

A further object of the invention is to provide apparatus of the above mentioned character, which is simple in construction, inexpensive to manufacture, strong and durable.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same, Figure 1 is a side elevation of a support embodying the invention, parts being broken away and parts in section, Fig. 2 is a longitudinal sectional view through the outer end of the horizontal arm of the support, and, Fig. 3 is a fragmentary side elevation of the vertical arm of the support, taken at a right angle to the showing in Fig. 1.

In the drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 5 designates a preferably tubular post or vertical arm, having its lower end internally screwthreaded for receiving an externally screwthreaded extension 6, which is rigidly attached to a foot or base 7, preferably formed integral therewith. This foot or base is provided with openings for receiving attaching screws 8, adapted to enter openings in the bottom, sides, or top of a mine, to rigidly anchor the foot or base thereto.

The numeral 9 designates an attaching extension, having a screw-threaded boss or trunnion 10 rigidly secured thereto and Specification of Letters Patent.

Patented Aug. 29, 1916.

Serial No. 48,487.

adapted for engagement within the upper end of the vertical post or arm 5, which is internally screw-threaded. This attaching extension is provided with a curved recess 11 and at its upper end with a longitudinal slot 12, as shown.

The numeral 13 designates a hasp, bent to provide a recess 14. This hasp has one end freely pivotally connected with the attaching extension 9, as shown at 15. The hasp 13 is provided at its free end with a longitudinal opening 16, to receive a clamp ing bolt 17 pivotally mounted within the opening 12 of the extension 9 by means of a bolt 18, passing through apertures in head 19. The bolt 17 carries a nut 20, as shown.

Arranged within the opening formed by the recesses 11 and 1 1 is a horizontal tubular arm 21, adapted to be clamped therein by proper manipulation of the nut 20. Longitudinally adjustably mounted within the outer end of the arm 21, but having no screw-threaded engagement therewith, is a jack-screw 22, carrying an operating nut 23, having screw-threaded engagement therewith and slidably contacting with the free end of the arm 21. The operating nut 23 is preferably provided with arms 2 1 for rotating it and this nut is held against accidental displacement by a lock-nut 25.

In the use of the support, the post 5 may be vertically arranged and the base 7 disposed upon the bottom of the mine. The screws 8 are properly manipulated to bind or anchor the base to this bottom. The jackscrew 22 is adjusted to engage the side of the mine, thus preventing improper lateral movements of the vertical post 5. It is obvious that the invention is in no sense restricted to this use, as the base 7 may be secured to the sides or top of the mine. The

drill may be attached to the vertical or horizontal arms of the support.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claim.

Having thus described the invention, I claim:

A support of the character described, comprising a tubular post having its lower end internally screw-threaded, an attaching extension provided with a trunnion project ing in the upper end of the tubular post and having a recess formed in one side thereof, a hasp pivotally connected with the attaching extension and having a recess disposed'opposite the first named recess, a bolt connecting corresponding ends of the attaching extension and hasp, a tubular arm adapted to be arranged within the recesses, a jack-screw arranged within the outer end of the tubular arm, an operating nut carried by the jack screw, an attaching foot Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C

first named tubular 15 

